Hash#has_key?() is a Hash class method which checks whether the given key is present in hash.
Syntax: Hash.has_key?()
Parameter: Hash values
Return: true – if the key is present otherwise return false
Example #1 :
# Ruby code for Hash.has_key?() method # declaring Hash value a = {a: 100 , b: 200 }
# declaring Hash value b = {a: 100 , c: 300 , b: 200 }
# declaring Hash value c = {a: 100 }
# has_key? Value puts "Hash a has_key? form : #{a.has_key?(" a ")}\n\n"
puts "Hash b has_key? form : #{b.has_key?(" c ")}\n\n"
puts "Hash c has_key? form : #{c.has_key?(" v ")}\n\n"
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Output :
Hash a has_key? form : false Hash b has_key? form : false Hash c has_key? form : false
Example #2 :
# Ruby code for Hash.has_key?() method # declaring Hash value a = { "a" => 100 , "b" => 200 }
# declaring Hash value b = { "a" => 100 }
# declaring Hash value c = { "a" => 100 , "c" => 300 , "b" => 200 }
# has_key? Value puts "Hash a has_key? form : #{a.has_key?(" a ")}\n\n"
puts "Hash b has_key? form : #{b.has_key?(" c ")}\n\n"
puts "Hash c has_key? form : #{c.has_key?(" v ")}\n\n"
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Output :
Hash a has_key? form : true Hash b has_key? form : false Hash c has_key? form : false